Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signalling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments; 3D spectacles; apertometers [optics]; testing apparatus not for medical purposes; diffraction apparatus [microscopy]; viewfinders, photographic; micrometer screws for optical instruments; optical discs; eyewear; measures; measuring instruments; instruments containing eyepieces; optical condensers; correcting lenses [optics]; close-up lenses; optical lenses; magnifying glasses [optics]; surveyors' levels; optical data media; computer software, recorded; objectives [lenses] [optics]; lenses for astrophotography; selfie lenses; eyepieces; mirrors [optics]; polarimeters; diagnostic apparatus, not for medical purposes; measuring apparatus; measuring devices, electric; optical apparatus and instruments; apparatus and instruments for physics; precision measuring apparatus; prisms [optics]; computer software applications, downloadable; computer programs, recorded; computer programs, downloadable; refractometers; refractors; lighting ballasts; spectrograph apparatus; spectroscopes; optical glass; optical character readers; photometers; spectrophotometers